/**
 * Cesium - https://github.com/AnalyticalGraphicsInc/cesium
 *
 * Copyright 2011-2017 Cesium Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Columbus View (Pat. Pend.)
 *
 * Portions licensed separately.
 * See https://github.com/AnalyticalGraphicsInc/cesium/blob/master/LICENSE.md for full licensing details.
 */
define(['./when-8d13db60', './Check-70bec281', './Math-61ede240', './Cartographic-fe4be337', './Cartesian2-85064f09', './BoundingSphere-775c5788', './Cartesian4-5af5bb24', './RuntimeError-ba10bc3e', './WebGLConstants-4c11ee5f', './ComponentDatatype-5862616f', './GeometryAttribute-91704ebb', './PrimitiveType-97893bc7', './FeatureDetection-7bd32c34', './Transforms-b2e71640', './buildModuleUrl-14bfe498', './GeometryAttributes-aacecde6', './IndexDatatype-9435b55f', './IntersectionTests-397d9494', './Plane-8390418f', './GeometryOffsetAttribute-ca302482', './arrayRemoveDuplicates-f0b089b1', './EllipsoidTangentPlane-a815c96f', './EllipsoidRhumbLine-f161e674', './earcut-2.2.1-b404d9e6', './PolygonPipeline-6a35d737', './PolylineVolumeGeometryLibrary-934b338a', './EllipsoidGeodesic-84507801', './PolylinePipeline-a9f32196', './CorridorGeometryLibrary-2bbb9869'], function (when, Check, _Math, Cartographic, Cartesian2, BoundingSphere, Cartesian4, RuntimeError, WebGLConstants, ComponentDatatype, GeometryAttribute, PrimitiveType, FeatureDetection, Transforms, buildModuleUrl, GeometryAttributes, IndexDatatype, IntersectionTests, Plane, GeometryOffsetAttribute, arrayRemoveDuplicates, EllipsoidTangentPlane, EllipsoidRhumbLine, earcut2_2_1, PolygonPipeline, PolylineVolumeGeometryLibrary, EllipsoidGeodesic, PolylinePipeline, CorridorGeometryLibrary) { 'use strict';

    var cartesian1 = new Cartographic.Cartesian3();
        var cartesian2 = new Cartographic.Cartesian3();
        var cartesian3 = new Cartographic.Cartesian3();

        function scaleToSurface(positions, ellipsoid) {
            for (var i = 0; i < positions.length; i++) {
                positions[i] = ellipsoid.scaleToGeodeticSurface(positions[i], positions[i]);
            }
            return positions;
        }

        function combine(computedPositions, cornerType) {
            var wallIndices = [];
            var positions = computedPositions.positions;
            var corners = computedPositions.corners;
            var endPositions = computedPositions.endPositions;
            var attributes = new GeometryAttributes.GeometryAttributes();
            var corner;
            var leftCount = 0;
            var rightCount = 0;
            var i;
            var indicesLength = 0;
            var length;
            for (i = 0; i < positions.length; i += 2) {
                length = positions[i].length - 3;
                leftCount += length; //subtracting 3 to account for duplicate points at corners
                indicesLength += length / 3 * 4;
                rightCount += positions[i + 1].length - 3;
            }
            leftCount += 3; //add back count for end positions
            rightCount += 3;
            for (i = 0; i < corners.length; i++) {
                corner = corners[i];
                var leftSide = corners[i].leftPositions;
                if (when.defined(leftSide)) {
                    length = leftSide.length;
                    leftCount += length;
                    indicesLength += length / 3 * 2;
                } else {
                    length = corners[i].rightPositions.length;
                    rightCount += length;
                    indicesLength += length / 3 * 2;
                }
            }

            var addEndPositions = when.defined(endPositions);
            var endPositionLength;
            if (addEndPositions) {
                endPositionLength = endPositions[0].length - 3;
                leftCount += endPositionLength;
                rightCount += endPositionLength;
                endPositionLength /= 3;
                indicesLength += endPositionLength * 4;
            }
            var size = leftCount + rightCount;
            var finalPositions = new Float64Array(size);
            var front = 0;
            var back = size - 1;
            var UL, LL, UR, LR;
            var rightPos, leftPos;
            var halfLength = endPositionLength / 2;

            var indices = IndexDatatype.IndexDatatype.createTypedArray(size / 3, indicesLength + 4);
            var index = 0;

            indices[index++] = front / 3;
            indices[index++] = (back - 2) / 3;
            if (addEndPositions) { // add rounded end
                wallIndices.push(front / 3);
                leftPos = cartesian1;
                rightPos = cartesian2;
                var firstEndPositions = endPositions[0];
                for (i = 0; i < halfLength; i++) {
                    leftPos = Cartographic.Cartesian3.fromArray(firstEndPositions, (halfLength - 1 - i) * 3, leftPos);
                    rightPos = Cartographic.Cartesian3.fromArray(firstEndPositions, (halfLength + i) * 3, rightPos);
                    CorridorGeometryLibrary.CorridorGeometryLibrary.addAttribute(finalPositions, rightPos, front);
                    CorridorGeometryLibrary.CorridorGeometryLibrary.addAttribute(finalPositions, leftPos, undefined, back);

                    LL = front / 3;
                    LR = LL + 1;
                    UL = (back - 2) / 3;
                    UR = UL - 1;
                    indices[index++] = UL;
                    indices[index++] = UR;
                    indices[index++] = LL;
                    indices[index++] = LR;

                    front += 3;
                    back -= 3;
                }
            }

            var posIndex = 0;
            var rightEdge = positions[posIndex++]; //add first two edges
            var leftEdge = positions[posIndex++];
            finalPositions.set(rightEdge, front);
            finalPositions.set(leftEdge, back - leftEdge.length + 1);

            length = leftEdge.length - 3;
            wallIndices.push(front / 3, (back - 2) / 3);
            for (i = 0; i < length; i += 3) {
                LL = front / 3;
                LR = LL + 1;
                UL = (back - 2) / 3;
                UR = UL - 1;
                indices[index++] = UL;
                indices[index++] = UR;
                indices[index++] = LL;
                indices[index++] = LR;

                front += 3;
                back -= 3;
            }

            for (i = 0; i < corners.length; i++) {
                var j;
                corner = corners[i];
                var l = corner.leftPositions;
                var r = corner.rightPositions;
                var start;
                var outsidePoint = cartesian3;
                if (when.defined(l)) {
                    back -= 3;
                    start = UR;
                    wallIndices.push(LR);
                    for (j = 0; j < l.length / 3; j++) {
                        outsidePoint = Cartographic.Cartesian3.fromArray(l, j * 3, outsidePoint);
                        indices[index++] = start - j - 1;
                        indices[index++] = start - j;
                        CorridorGeometryLibrary.CorridorGeometryLibrary.addAttribute(finalPositions, outsidePoint, undefined, back);
                        back -= 3;
                    }
                    wallIndices.push(start - Math.floor(l.length / 6));
                    if (cornerType === PolylineVolumeGeometryLibrary.CornerType.BEVELED) {
                        wallIndices.push((back - 2) / 3 + 1);
                    }
                    front += 3;
                } else {
                    front += 3;
                    start = LR;
                    wallIndices.push(UR);
                    for (j = 0; j < r.length / 3; j++) {
                        outsidePoint = Cartographic.Cartesian3.fromArray(r, j * 3, outsidePoint);
                        indices[index++] = start + j;
                        indices[index++] = start + j + 1;
                        CorridorGeometryLibrary.CorridorGeometryLibrary.addAttribute(finalPositions, outsidePoint, front);
                        front += 3;
                    }
                    wallIndices.push(start + Math.floor(r.length / 6));
                    if (cornerType === PolylineVolumeGeometryLibrary.CornerType.BEVELED) {
                        wallIndices.push(front / 3 - 1);
                    }
                    back -= 3;
                }
                rightEdge = positions[posIndex++];
                leftEdge = positions[posIndex++];
                rightEdge.splice(0, 3); //remove duplicate points added by corner
                leftEdge.splice(leftEdge.length - 3, 3);
                finalPositions.set(rightEdge, front);
                finalPositions.set(leftEdge, back - leftEdge.length + 1);
                length = leftEdge.length - 3;

                for (j = 0; j < leftEdge.length; j += 3) {
                    LR = front / 3;
                    LL = LR - 1;
                    UR = (back - 2) / 3;
                    UL = UR + 1;
                    indices[index++] = UL;
                    indices[index++] = UR;
                    indices[index++] = LL;
                    indices[index++] = LR;
                    front += 3;
                    back -= 3;
                }
                front -= 3;
                back += 3;
                wallIndices.push(front / 3, (back - 2) / 3);
            }

            if (addEndPositions) { // add rounded end
                front += 3;
                back -= 3;
                leftPos = cartesian1;
                rightPos = cartesian2;
                var lastEndPositions = endPositions[1];
                for (i = 0; i < halfLength; i++) {
                    leftPos = Cartographic.Cartesian3.fromArray(lastEndPositions, (endPositionLength - i - 1) * 3, leftPos);
                    rightPos = Cartographic.Cartesian3.fromArray(lastEndPositions, i * 3, rightPos);
                    CorridorGeometryLibrary.CorridorGeometryLibrary.addAttribute(finalPositions, leftPos, undefined, back);
                    CorridorGeometryLibrary.CorridorGeometryLibrary.addAttribute(finalPositions, rightPos, front);

                    LR = front / 3;
                    LL = LR - 1;
                    UR = (back - 2) / 3;
                    UL = UR + 1;
                    indices[index++] = UL;
                    indices[index++] = UR;
                    indices[index++] = LL;
                    indices[index++] = LR;

                    front += 3;
                    back -= 3;
                }

                wallIndices.push(front / 3);
            } else {
                wallIndices.push(front / 3, (back - 2) / 3);
            }
            indices[index++] = front / 3;
            indices[index++] = (back - 2) / 3;

            attributes.position = new GeometryAttribute.GeometryAttribute({
                componentDatatype : ComponentDatatype.ComponentDatatype.DOUBLE,
                componentsPerAttribute : 3,
                values : finalPositions
            });

            return {
                attributes : attributes,
                indices : indices,
                wallIndices : wallIndices
            };
        }

        function computePositionsExtruded(params) {
            var ellipsoid = params.ellipsoid;
            var computedPositions = CorridorGeometryLibrary.CorridorGeometryLibrary.computePositions(params);
            var attr = combine(computedPositions, params.cornerType);
            var wallIndices = attr.wallIndices;
            var height = params.height;
            var extrudedHeight = params.extrudedHeight;
            var attributes = attr.attributes;
            var indices = attr.indices;
            var positions = attributes.position.values;
            var length = positions.length;
            var extrudedPositions = new Float64Array(length);
            extrudedPositions.set(positions);
            var newPositions = new Float64Array(length * 2);

            positions = PolygonPipeline.PolygonPipeline.scaleToGeodeticHeight(positions, height, ellipsoid);
            extrudedPositions = PolygonPipeline.PolygonPipeline.scaleToGeodeticHeight(extrudedPositions, extrudedHeight, ellipsoid);
            newPositions.set(positions);
            newPositions.set(extrudedPositions, length);
            attributes.position.values = newPositions;

            length /= 3;
            if (when.defined(params.offsetAttribute)) {
                var applyOffset = new Uint8Array(length * 2);
                if (params.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.TOP) {
                    applyOffset = GeometryOffsetAttribute.arrayFill(applyOffset, 1, 0, length);
                } else {
                    var applyOffsetValue = params.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE ? 0 : 1;
                    applyOffset = GeometryOffsetAttribute.arrayFill(applyOffset, applyOffsetValue);
                }

                attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
                    componentDatatype : ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
                    componentsPerAttribute : 1,
                    values: applyOffset
                });
            }

            var i;
            var iLength = indices.length;
            var newIndices = IndexDatatype.IndexDatatype.createTypedArray(newPositions.length / 3, (iLength + wallIndices.length) * 2);
            newIndices.set(indices);
            var index = iLength;
            for (i = 0; i < iLength; i += 2) { // bottom indices
                var v0 = indices[i];
                var v1 = indices[i + 1];
                newIndices[index++] = v0 + length;
                newIndices[index++] = v1 + length;
            }

            var UL, LL;
            for (i = 0; i < wallIndices.length; i++) { //wall indices
                UL = wallIndices[i];
                LL = UL + length;
                newIndices[index++] = UL;
                newIndices[index++] = LL;
            }

            return {
                attributes : attributes,
                indices : newIndices
            };
        }

        /**
         * A description of a corridor outline.
         *
         * @alias CorridorOutlineGeometry
         * @constructor
         *
         * @param {Object} options Object with the following properties:
         * @param {Cartesian3[]} options.positions An array of positions that define the center of the corridor outline.
         * @param {Number} options.width The distance between the edges of the corridor outline.
         * @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
         * @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
         * @param {Number} [options.height=0] The distance in meters between the positions and the ellipsoid surface.
         * @param {Number} [options.extrudedHeight] The distance in meters between the extruded face and the ellipsoid surface.
         * @param {CornerType} [options.cornerType=CornerType.ROUNDED] Determines the style of the corners.
         *
         * @see CorridorOutlineGeometry.createGeometry
         *
         * @example
         * var corridor = new Cesium.CorridorOutlineGeometry({
         *   positions : Cesium.Cartesian3.fromDegreesArray([-72.0, 40.0, -70.0, 35.0]),
         *   width : 100000
         * });
         */
        function CorridorOutlineGeometry(options) {
            options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
            var positions = options.positions;
            var width = options.width;

            //>>includeStart('debug', pragmas.debug);
            Check.Check.typeOf.object('options.positions', positions);
            Check.Check.typeOf.number('options.width', width);
            //>>includeEnd('debug');

            var height = when.defaultValue(options.height, 0.0);
            var extrudedHeight = when.defaultValue(options.extrudedHeight, height);

            this._positions = positions;
            this._ellipsoid = Cartesian2.Ellipsoid.clone(when.defaultValue(options.ellipsoid, Cartesian2.Ellipsoid.WGS84));
            this._width = width;
            this._height = Math.max(height, extrudedHeight);
            this._extrudedHeight = Math.min(height, extrudedHeight);
            this._cornerType = when.defaultValue(options.cornerType, PolylineVolumeGeometryLibrary.CornerType.ROUNDED);
            this._granularity = when.defaultValue(options.granularity, _Math.CesiumMath.RADIANS_PER_DEGREE);
            this._offsetAttribute = options.offsetAttribute;
            this._workerName = 'createCorridorOutlineGeometry';

            /**
             * The number of elements used to pack the object into an array.
             * @type {Number}
             */
            this.packedLength = 1 + positions.length * Cartographic.Cartesian3.packedLength + Cartesian2.Ellipsoid.packedLength + 6;
        }

        /**
         * Stores the provided instance into the provided array.
         *
         * @param {CorridorOutlineGeometry} value The value to pack.
         * @param {Number[]} array The array to pack into.
         * @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
         *
         * @returns {Number[]} The array that was packed into
         */
        CorridorOutlineGeometry.pack = function(value, array, startingIndex) {
            //>>includeStart('debug', pragmas.debug);
            Check.Check.typeOf.object('value', value);
            Check.Check.typeOf.object('array', array);
            //>>includeEnd('debug');

            startingIndex = when.defaultValue(startingIndex, 0);

            var positions = value._positions;
            var length = positions.length;
            array[startingIndex++] = length;

            for (var i = 0; i < length; ++i, startingIndex += Cartographic.Cartesian3.packedLength) {
                Cartographic.Cartesian3.pack(positions[i], array, startingIndex);
            }

            Cartesian2.Ellipsoid.pack(value._ellipsoid, array, startingIndex);
            startingIndex += Cartesian2.Ellipsoid.packedLength;

            array[startingIndex++] = value._width;
            array[startingIndex++] = value._height;
            array[startingIndex++] = value._extrudedHeight;
            array[startingIndex++] = value._cornerType;
            array[startingIndex++] = value._granularity;
            array[startingIndex] = when.defaultValue(value._offsetAttribute, -1);

            return array;
        };

        var scratchEllipsoid = Cartesian2.Ellipsoid.clone(Cartesian2.Ellipsoid.UNIT_SPHERE);
        var scratchOptions = {
            positions : undefined,
            ellipsoid : scratchEllipsoid,
            width : undefined,
            height : undefined,
            extrudedHeight : undefined,
            cornerType : undefined,
            granularity : undefined,
            offsetAttribute: undefined
        };

        /**
         * Retrieves an instance from a packed array.
         *
         * @param {Number[]} array The packed array.
         * @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
         * @param {CorridorOutlineGeometry} [result] The object into which to store the result.
         * @returns {CorridorOutlineGeometry} The modified result parameter or a new CorridorOutlineGeometry instance if one was not provided.
         */
        CorridorOutlineGeometry.unpack = function(array, startingIndex, result) {
            //>>includeStart('debug', pragmas.debug);
            Check.Check.typeOf.object('array', array);
            //>>includeEnd('debug');

            startingIndex = when.defaultValue(startingIndex, 0);

            var length = array[startingIndex++];
            var positions = new Array(length);

            for (var i = 0; i < length; ++i, startingIndex += Cartographic.Cartesian3.packedLength) {
                positions[i] = Cartographic.Cartesian3.unpack(array, startingIndex);
            }

            var ellipsoid = Cartesian2.Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
            startingIndex += Cartesian2.Ellipsoid.packedLength;

            var width = array[startingIndex++];
            var height = array[startingIndex++];
            var extrudedHeight = array[startingIndex++];
            var cornerType = array[startingIndex++];
            var granularity = array[startingIndex++];
            var offsetAttribute = array[startingIndex];

            if (!when.defined(result)) {
                scratchOptions.positions = positions;
                scratchOptions.width = width;
                scratchOptions.height = height;
                scratchOptions.extrudedHeight = extrudedHeight;
                scratchOptions.cornerType = cornerType;
                scratchOptions.granularity = granularity;
                scratchOptions.offsetAttribute = offsetAttribute === -1 ? undefined : offsetAttribute;
                return new CorridorOutlineGeometry(scratchOptions);
            }

            result._positions = positions;
            result._ellipsoid = Cartesian2.Ellipsoid.clone(ellipsoid, result._ellipsoid);
            result._width = width;
            result._height = height;
            result._extrudedHeight = extrudedHeight;
            result._cornerType = cornerType;
            result._granularity = granularity;
            result._offsetAttribute = offsetAttribute === -1 ? undefined : offsetAttribute;

            return result;
        };

        /**
         * Computes the geometric representation of a corridor, including its vertices, indices, and a bounding sphere.
         *
         * @param {CorridorOutlineGeometry} corridorOutlineGeometry A description of the corridor.
         * @returns {Geometry|undefined} The computed vertices and indices.
         */
        CorridorOutlineGeometry.createGeometry = function(corridorOutlineGeometry) {
            var positions = corridorOutlineGeometry._positions;
            var width = corridorOutlineGeometry._width;
            var ellipsoid = corridorOutlineGeometry._ellipsoid;

            positions = scaleToSurface(positions, ellipsoid);
            var cleanPositions = arrayRemoveDuplicates.arrayRemoveDuplicates(positions, Cartographic.Cartesian3.equalsEpsilon);

            if ((cleanPositions.length < 2) || (width <= 0)) {
                return;
            }

            var height = corridorOutlineGeometry._height;
            var extrudedHeight = corridorOutlineGeometry._extrudedHeight;
            var extrude = !_Math.CesiumMath.equalsEpsilon(height, extrudedHeight, 0, _Math.CesiumMath.EPSILON2);

            var params = {
                ellipsoid : ellipsoid,
                positions : cleanPositions,
                width : width,
                cornerType : corridorOutlineGeometry._cornerType,
                granularity : corridorOutlineGeometry._granularity,
                saveAttributes : false
            };
            var attr;
            if (extrude) {
                params.height = height;
                params.extrudedHeight = extrudedHeight;
                params.offsetAttribute = corridorOutlineGeometry._offsetAttribute;
                attr = computePositionsExtruded(params);
            } else {
                var computedPositions = CorridorGeometryLibrary.CorridorGeometryLibrary.computePositions(params);
                attr = combine(computedPositions, params.cornerType);
                attr.attributes.position.values = PolygonPipeline.PolygonPipeline.scaleToGeodeticHeight(attr.attributes.position.values, height, ellipsoid);

                if (when.defined(corridorOutlineGeometry._offsetAttribute)) {
                    var length = attr.attributes.position.values.length;
                    var applyOffset = new Uint8Array(length / 3);
                    var offsetValue = corridorOutlineGeometry._offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE ? 0 : 1;
                    GeometryOffsetAttribute.arrayFill(applyOffset, offsetValue);
                    attr.attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
                        componentDatatype : ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
                        componentsPerAttribute : 1,
                        values: applyOffset
                    });
                }
            }
            var attributes = attr.attributes;
            var boundingSphere = BoundingSphere.BoundingSphere.fromVertices(attributes.position.values, undefined, 3);

            return new GeometryAttribute.Geometry({
                attributes : attributes,
                indices : attr.indices,
                primitiveType : PrimitiveType.PrimitiveType.LINES,
                boundingSphere : boundingSphere,
                offsetAttribute : corridorOutlineGeometry._offsetAttribute
            });
        };

    function createCorridorOutlineGeometry(corridorOutlineGeometry, offset) {
        if (when.defined(offset)) {
            corridorOutlineGeometry = CorridorOutlineGeometry.unpack(corridorOutlineGeometry, offset);
        }
        corridorOutlineGeometry._ellipsoid = Cartesian2.Ellipsoid.clone(corridorOutlineGeometry._ellipsoid);
        return CorridorOutlineGeometry.createGeometry(corridorOutlineGeometry);
    }

    return createCorridorOutlineGeometry;

});
